研究者詳細 - 黒島　義人

論文 - 黒島　義人

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繰返し面内純せん断負荷下における炭素鋼薄膜の疲労挙動に及ぼす硬質第二相の影響査読有り

今村　隼斗, 林　真由, 黒島　義人

材料 ( 公益社団法人日本材料学会 ) 73 ( 8 ) 675 - 681 2024年08月

担当区分：最終著者,　責任著者記述言語：日本語掲載種別：研究論文（学術雑誌）

Fatigue behaviors in thin films and bulk materials exhibit differences, even when they are composed of the same material. Studies indicate that the proportion of crystals exhibiting slip reached saturation at 0.1 under cyclic shear loading. This research aims to elucidate the slip behavior and crack initiation in carbon steel thin films under cyclic shear loading. We examined the influence of carbon content, film thickness, and hardened region on slip and crack formation. Pure iron, S10C, S25C, and S45C were chosen as test specimens to investigate the impact of carbon content. To study the effect of film thickness, we conducted tests with a film thickness to grain size ratio (t/D) of less than 0.80 and greater than 1.00. A Shimadzu TB-10 torsion bending tester was utilized for these tests. The results revealed that in-plane slips and cracks are more likely to occur with a larger volume fraction of the hard phase area, while out-plane slips are more likely with a smaller volume fraction. An increase in the t/D ratio led to an increase in out-plane slips, but did not affect in-plane slips and cracks. This study led to three key observations: in-plane slips occur more frequently when the volume fraction of pearlite or martensite is large, which is thought to be due to strain concentration; out-plane slips occur more frequently when t/D exceeds 1.00, suggesting that they are caused by the deformation of crystal grains in the film thickness direction; and the larger the amount of in-plane slip, the more cracks are observed, indicating that the cracks are a result of in-plane slip.

DOI： 10.2472/jsms.73.675

Scopus

CiNii Research

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85201640508&origin=inward

鋼の逆磁歪効果を利用した微小疲労き裂情報の測定～逆磁歪効果における誘導磁場出力について～査読有り

田中洸成, 野中維生, 黒島義人

材料 ( 公益社団法人日本材料学会 ) 72 ( 10 ) 729 - 736 2023年10月

担当区分：最終著者,　責任著者記述言語：日本語掲載種別：研究論文（学術雑誌）

There is a method using a strain gauge as a dynamic measurement of micro-fatigue cracks. However, it is not always effective in term of measuring micro-fatigue cracks due to direct adhesion with the object and durability issues. Therefore, we focused on the inverse magnetostrictive effect, which is a magnetic effect of ferromagnetic materials, and measured the change of the magnetic field by a simple instrument without adhesion with glue. It is possible to measure micro fatigue crack information.In this study, the change of magnetic field around specimens caused by the inverse magnetostrictive effect was obtained and analyzed using a coil and a hall sensor. Based on a certain coil output, the coil output was estimated from the relationship between the strain rate and the coil output.

DOI： 10.2472/jsms.72.729

Scopus

CiNii Research

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85176404391&origin=inward

繰返し面内純せん断負荷下における鋼薄膜のすべりとき裂の発生挙動査読有り

森本裕, 今村隼斗, 黒島義人

材料 ( 公益社団法人日本材料学会 ) 72 ( 10 ) 713 - 720 2023年10月

担当区分：最終著者,　責任著者記述言語：日本語掲載種別：研究論文（学術雑誌）

In the same materials, film and bulk materials show different mechanical properties. Slip and crack initiation is rare in steel thin films. The slip that does occur is also dependent on the influence of the pearlite volume ratio and the film thickness directional constraint. The slip is reported to have an in-plane shear component and an out-plane shear component. Therefore, in this study we conducted fatigue tests under in-plane pure shear loading on specimens with steel films pasted to acrylic bar. As a result, two types of slips were observed: wavy slip and single linear slip and more wavy slip occurred in pure iron and S10C, while more single linear slip occurred in S45C. Crack initiation ratio and single linear slip initiation ratio showed similar increasing behavior. In addition, wavy slips in the grain were found to be in the out-plane direction, and a single linear slip in the grain was in the in-plane direction. Wavy slip (out-plane slip) is considered to occur only in ferrite that deformation is restrained by grains existing in the thickness direction. Single linear slip (in-plane slip) is considered to be caused by concentrated slip deformation or separation of slip planes in ferrite where plastic deformation is inhibited by hard pearlite, resulting in cracks.

DOI： 10.2472/jsms.72.713

Scopus

CiNii Research

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85176421249&origin=inward

繰返し面内純せん断負荷における炭素鋼薄膜の疲労損傷発生機構査読有り

山下剛志，植田大輝，黒島義人

日本機械学会論文集 838 ( 80 ) 15 - 27 2016年06月

高強度鋼のODA型き裂進展領域における極低速き裂進展挙動査読有り

古藤正稔, 黒島義人, 吉村直也

日本機械学会論文集 815 ( 80 ) 1 - 12 2014年07月

鋼のねじり低サイクル疲労におけるManson-Coffin則の結晶粒径依存性

伊賀寛人, 黒島義人

M&M材料力学カンファレンス ( 一般社団法人日本機械学会 ) 2023 ( 0 ) MM0639 2023年01月

担当区分：最終著者,　責任著者記述言語：日本語掲載種別：研究論文（研究会，シンポジウム資料等）

Many actual structures, such as piping and turbine shafts, are subjected to torsional low-cycle fatigue. However, there have been many studies on high-cycle fatigue due to torsion, but few studies on low-cycle fatigue due to torsion alone, and there are many unknown points. Fatigue tests were conducted in a torsion testing machine (490 Nm capacity) at room temperature in air, with both swings and controlled torsion angles over a specified total strain range. Cracks were observed using the replica method, in which replicas of the specimen surface were taken at regular intervals in each total strain range and observed with an optical microscope. In this study, it is shown that there is a grain size dependence of the Manson-Coffin law in torsional low-cycle fatigue and that the microcrack propagation rate is independent of crack length in torsional low-cycle fatigue.

DOI： 10.1299/jsmemm.2023.mm0639

CiNii Research

その他リンク： https://www.jstage.jst.go.jp/article/jsmemm/2023/0/2023_MM0639/_pdf

繰返し面内純せん断負荷下における炭素鋼薄膜のすべりとき裂の発生挙動

今村隼斗, 黒島義人

M&M材料力学カンファレンス ( 一般社団法人日本機械学会 ) 2023 ( 0 ) MM0604 2023年01月

担当区分：最終著者,　責任著者記述言語：日本語掲載種別：研究論文（研究会，シンポジウム資料等）

Fatigue behaviors differ between thin film and bulk materials, even if they are the same material. Reports show that the incidence of grain slip saturates at 0.1 when loading is applied in the shear direction. The purpose of this study is to clarify the behavior of slip and crack initiation in carbon steel thin films subjected to cyclic shear loading. We investigated the effects of carbon content and film thickness on slip and cracks. Pure iron, S10C and S45C are selected as specimens to investigate the effect of carbon content. Then, to investigate the effect of film thickness, tests are conducted with film thickness/grain size ratio t/D less than 0.8 and greater than 1.67. A torsion bending tester (Shimadzu TB-10) is used. As a result, in-plane slips and cracks are more likely to occur with higher carbon content, while out-plane slips are more likely to occur with lower it. Increasing the t/D increased out-plane slips, but not increasing in-plane slips and cracks. The following three points are considered from this study. In-plane slips occur more frequently when the volume fraction of pearlite is large, and is considered to be caused by the concentration of strain. Out-plane slips occur more frequently when t/D exceeds 1.67, suggesting that it is caused by the deformation of crystal grains in the film thickness direction. The larger the amount of in-plane slip, the more cracks are observed, suggesting that the cracks are caused by in-plane slip.

DOI： 10.1299/jsmemm.2023.mm0604

CiNii Research

その他リンク： https://www.jstage.jst.go.jp/article/jsmemm/2023/0/2023_MM0604/_pdf

高強度鋼の真空下における超長寿命域でのき裂伝ぱ特性について

黒島義人, 入井涼介, 藤井海南斗

M&M材料力学カンファレンス ( 一般社団法人日本機械学会 ) 2022 ( 0 ) OS0317 2022年01月

担当区分：責任著者記述言語：日本語掲載種別：研究論文（研究会，シンポジウム資料等）

In general, high-strength steel is known to occur an internally initiated fatigue fracture called "Fish-eye failure" in the very long life region. In addition, the fatigue life of a fish-eye failure is dominated by the ODA (Optically Dark Area) that forms around the fracture origin. Therefore, it is necessary to elucidate the formative mechanism of ODA in order to predict the fatigue life of fish eye failure. Besides, it has been reported that small surface cracks propagate at extremely low speeds below the lattice spacing in a vacuum simulating the interior of high-strength steel. However, it has not been confirmed that the growth of these small cracks forms ODA. In this study, fatigue tests were conducted from a very short crack to a long crack, which corresponds to internal failure in the very long life region, instead of the fatigue tests with a relatively long crack of around 150 μm that have been conducted so far. The results of intermittent observation of the growth behavior and the relationship between the crack growth rate, stress intensity factor, and maximum stress suggest that small cracks grow and form ODAs.

DOI： 10.1299/jsmemm.2022.os0317

CiNii Research

その他リンク： https://www.jstage.jst.go.jp/article/jsmemm/2022/0/2022_OS0317/_pdf

繰返し面内純せん断負荷における炭素鋼薄膜の疲労挙動

森本裕, 黒島義人

M&M材料力学カンファレンス ( 一般社団法人日本機械学会 ) 2022 ( 0 ) OS0328 2022年01月

担当区分：責任著者記述言語：日本語掲載種別：研究論文（研究会，シンポジウム資料等）

In the same materials, film and bulk materials show different mechanical properties. In fatigue testing of metallic thin film, several studies have been reported for axial and bending directions, however, there are few studies for shear direction. In addition, multiple parallel slips in the same grain are considered out-plane direction, a single linear slip in a grain is considered in-plane direction. Therefore, in this study we conducted fatigue tests under cyclic in-plane pure shear loading to S10C and S45C.We focused on the effect of pearlite volume fraction on slip generation and the relationship between cracks and slips. As a result, about 90% of the slip that occurred in S10C was out-plane direction. About 70% of the slip that occurred in S45C was in-plane slip. This is considered to be caused by the concentration of strain due to pearlite. In addition, more cracks were observed in S45C than in S10C, Consequently, cracks in the carbon steel film are considered to have grown from in-plane slip.

DOI： 10.1299/jsmemm.2022.os0328

CiNii Research

その他リンク： https://www.jstage.jst.go.jp/article/jsmemm/2022/0/2022_OS0328/_pdf

高強度鋼の超高サイクル域における極低速き裂進展について

飯田啓太, 黒島義人

日本機械学会九州支部講演論文集 ( 一般社団法人日本機械学会 ) 2021.74 ( 0 ) D44 2021年01月

鋼の磁歪特性を利用した微小疲労き裂の測定

跡部亮輔, 黒島義人

日本機械学会九州支部講演論文集 ( 一般社団法人日本機械学会 ) 2021.74 ( 0 ) D52 2021年01月

繰返し面内純せん断負荷下における炭素鋼薄膜のすべり発生挙動

森田隼斗, 黒島義人

日本機械学会九州支部講演論文集 ( 一般社団法人日本機械学会 ) 2021.74 ( 0 ) D54 2021年01月

低サイクルねじり疲労におけるManson-Coffin型寿命線図に与える結晶粒径の影響

古長友哉, 黒島義人

日本機械学会九州支部講演論文集 ( 一般社団法人日本機械学会 ) 2021.74 ( 0 ) D25 2021年01月

Brittle failure criteria of CNRB specimen for fracture toughness test 査読有り

KANESAKI Manato, OBUNAI Kiyotaka, FUKUTA Tadao, KUROSHIMA Yoshihito, OZAKI Koichi

Mechanical Engineering Journal ( 一般社団法人日本機械学会 ) 7 ( 4 ) 19 - 00621-19-00621 2020年01月

担当区分：責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

This paper proposes a technique to determine the dimensions of a CNRB specimen to be used for plane fracture toughness tests. First, the brittle fracture behavior satisfying the small-scale yielding condition is investigated through an elasto-plastic analysis. The analysis parameters are the shape parameters such as the notch ratio of the specimen based on the parallel part diameter and notch bottom diameter; tip radius; and notch angle. Based on the analysis results obtained, a fracture toughness test is conducted on a JIS-S45C (quenched and tempered) specimen to evaluate the small-scale yielding condition. The experimental results confirm a linear relationship between the square of the value obtained by dividing the plane-strain fracture toughness by the yield stress and specimen diameter. Further, the diameter of the CNRB specimen satisfying the small-scale yielding condition varies with the shape parameters. With these results, a function that can determine the CNRB specimen diameter at which brittle failure occurs under uniaxial tensile loading is proposed and validated.

DOI： 10.1299/mej.19-00621

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CiNii Research

その他リンク： https://ci.nii.ac.jp/naid/130007887808

Fatigue Properties of Quenching and Tempering Steel Using Super Rapid Induction Heating 査読有り

FUKUTA Tadao, KUROSHIMA Yoshihito, KANESAKI Manato, OZAKI Koichi

Advanced Experimental Mechanics ( 日本実験力学会 ) 5 ( 0 ) 97 - 102 2020年01月

担当区分：責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

The mechanical properties of steels are known to be improved by grain refinement and by smaller and more finely dispersed cementite particles. Super-rapid induction tempering can achieve smaller and more finely dispersed cementite particles, and super-rapid induction quenching can improve grain refinement. In this study, we investigated the fatigue properties of carbon steel treated by induction quenching and tempering using a super-rapid induction heating technique. Hollow test specimens were fabricated to observe the mechanical properties of the structure obtained by induction heating. Based on our observations, in the finite-life region, no difference was found between tempering conditions for each hardness value, but a transition to longer life due to differences in quenching conditions was observed. In addition, no clear grain refining effect was found in the fatigue limit of induction-quenched steel in the range of the quenching conditions of this study. However, a delay effect due to grain refinement was recognized at the initial stage of crack growth from the consideration of the crack growth rate of induction-tempered steel.

DOI： 10.11395/aem.5.0_97

CiNii Article

CiNii Research

その他リンク： https://ci.nii.ac.jp/naid/130007953457

低サイクルねじり疲労における微小き裂伝播特性とManson-coffin則の関係

氷室天, 黒島義人

M&M材料力学カンファレンス ( 一般社団法人日本機械学会 ) 2019 ( 0 ) OS0303 2019年01月

担当区分：責任著者記述言語：日本語掲載種別：研究論文（研究会，シンポジウム資料等）

A low cycle torsional fatigue test of carbon steel S10C for machine structural use was performed with strain control. Using a mechanism that applied Martens's mirror device, the scale was read, and the torsional torque was increased or decreased to achieve a predetermined torsional angle, and experiments were performed with total strain widths γ = 1.0%, 1.5%, and 2.0%. As a result, the propagation behavior of cracks in low cycle torsional fatigue was connected and propagated by innumerable microcracks. The fatigue life calculated by the small crack propagation law, focusing on the main crack that caused the fracture, was equivalent to the fatigue life of the Manson-Coffin's law.

DOI： 10.1299/jsmemm.2019.OS0303

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CiNii Research

その他リンク： https://ci.nii.ac.jp/naid/130007846376

面内純せん断負荷下での炭素鋼薄膜のき裂発生におよぼす金属学的因子の影響

野村拓哉, 黒島義人

M&M材料力学カンファレンス ( 一般社団法人日本機械学会 ) 2019 ( 0 ) OS0302 2019年01月

担当区分：責任著者記述言語：日本語掲載種別：研究論文（研究会，シンポジウム資料等）

At the same materials, mechanical properties of a film different from those of a bulk and we consider that fatigue property of a film is different from that of a bulk. In this study, According to a report by Ueda et al., It was reported that when a thin film experiment was conducted, the occurrence of slips and cracks was small. It has been reported that crystals also differ from in-plane and out-of-plane shear components．Therefore, in this study, we investigated the difference in the location and concentration of slip due to the pearlite volume fraction of carbon steel thin films, and the mode of occurrence of slip using EBSD and metallurgical factors.As for the form of slip, pure iron is near the grain boundary, and in S10C, several slips occur in parallel within the same grain. What was occurring was confirmed.S10C slips are considered to occur only in crystals that satisfy certain conditions, such as having multiple crystals in the film thickness direction and pearlite on both sides. Other non-slip crystals are considered to be plastically deformed due to the high pure shear applied, so slips are occurring but are considered to have been restored.

DOI： 10.1299/jsmemm.2019.OS0302

CiNii Article

CiNii Research

その他リンク： https://ci.nii.ac.jp/naid/130007846378

高強度鋼のΔKが4MPa√m以下の極低速き裂進展挙動について

堀貴雄, 黒島義人

M&M材料力学カンファレンス ( 一般社団法人日本機械学会 ) 2018 ( 0 ) OS1408 2018年01月

担当区分：責任著者記述言語：日本語掲載種別：研究論文（研究会，シンポジウム資料等）

High Strength Steel shows internal origin type fatigue failure as called Fish eye failure in low stress and high cycle region. In this failure, ODA is formed on the fracture surface. Although the explication of the mechanism of ODA formation is needed for the explication of the Fish eye failure mechanism, the explication is not yet accomplished. It’s reported that internal fatigue crack in high strength steel is propagating extremely slowly by recent investigations. And crack propagation rate was suggested that series of the low alloy steel depend on the maximum stress and ΔK. In this study, fatigue test of the same material was in vacuum environment. As a result, ΔK≤4 MPa√m as for crack propagation rate, it suggested that the test on condition of long initial crack was faster than the test on condition of short initial crack. Therefore crack progress speed depend on the test conditions as well as the maximum stress.

DOI： 10.1299/jsmemm.2018.os1408

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CiNii Research

その他リンク： https://www.jstage.jst.go.jp/article/jsmemm/2018/0/2018_OS1408/_pdf

磁歪特性を利用した周辺磁場計測による微小き裂情報の測定

小松昭文, 黒島義人

M&M材料力学カンファレンス ( 一般社団法人日本機械学会 ) 2018 ( 0 ) OS0414 2018年01月

担当区分：責任著者記述言語：日本語掲載種別：研究論文（研究会，シンポジウム資料等）

Small fatigue crack closure is observed as a thing with a possibility that the influence of change of the stress level and a stress ratio, etc. to the crack growth behavior can be explained, and until now various researches have been done. Although there is a method using the strain gage as the dynamic measurement method required for the elucidation of a minute fatigue crack, in respect of generating of minute fatigue cracks being directly contacted to a measuring object thing, and there is a problem in durability or measurement of the crack growth behavior, it may not necessarily be effective. Then, its attention was paid to the magnetostriction effect which is one of the magnetic actions of a ferromagnetic substance. Measurement of micro fatigue crack information under dynamic load without requiring a simple device and contact with the object was carried out and the change in the magnetic field around the test piece due to the magnetostrictive effect was measured using a coil. We investigated micro fatigue crack information from the information.

DOI： 10.1299/jsmemm.2018.os0414

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CiNii Research

その他リンク： https://www.jstage.jst.go.jp/article/jsmemm/2018/0/2018_OS0414/_pdf

面内純せん断負荷下での炭素鋼薄膜のき裂発生におよぼす微視組織の影響

利光秀康, 黒島義人

M&M材料力学カンファレンス ( 一般社団法人日本機械学会 ) 2017 ( 0 ) OS0533 2017年01月

担当区分：責任著者記述言語：日本語掲載種別：研究論文（研究会，シンポジウム資料等）

At the same materials, mechanical properties of a film different from those of a bulk and we consider that fatigue property of a film is different from that of a bulk. In this study, we think that formation of fatigue slip band of thin film materials of pure iron , S10C, and S45C, are different from each other and conducted a microscopic observation of the slip band of each thin films. Also we observed strains of each thin films by using Electron Back Scatter Diffraction Pattern (EBSD). As a result, we confirmed that slip bands occurred at the grain boundaries in pure iron, slip bands occurred in a wide range within the grains in S10C and slip bands occurred in a short range within the grains in S45C. Also we consider that strain occurred at the grain boundaries in pure iron, strains occurred in a wide range within the grains in S10C and strains occurred in a short range within the grains in S45C by EBSD. We indicate that in the case of carbon steel, forms of generation of strain within the ferrite crystal grain differs depending on the different in restraint of perlite.

DOI： 10.1299/jsmemm.2017.os0533

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CiNii Research

その他リンク： https://www.jstage.jst.go.jp/article/jsmemm/2017/0/2017_OS0533/_pdf

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